KR101495570B1 - Printing method for printed matter using inkjet printer - Google Patents

Abstract

The present invention relates to a method for printing indoor and outdoor printed matters of an inkjet printer which forms a plurality of nozzle hole sets by dividing the entire nozzle holes of a nozzle of an inkjet printer, allots a print pattern (including print concentration) for each nozzle hole set, ND performs printing with various print patterns in an overlap area added in order to meet the standard print concentration and obtain high quality after the basic printing, thereby preventing a print quality defect from being generated due to the banding phenomenon of generating a line on the printed matter in a printing direction caused by output defect of a print system if an outdoor printed out (or a sign), such as placard, or an indoor printed matter, such as various indoor stickers, is printed by an inkjet printer. According to the present invention, the method for printing indoor and outdoor printed matters of an inkjet printer includes: (a) a step of forming a plurality of nozzle hole sets by dividing the entire nozzle holes of a nozzle of an inkjet printer and allotting a printed pattern including a print concentration for each nozzle hole set; (b) a step of primarily printing on a printed matter to form a print area corresponding to the print pattern allotted for each nozzle hole set; and (c) a step of secondarily printing a print pattern in a printed area below the standard printing concentration by being additionally overlapped to correspond to the printing concentration allotted for each nozzle hole set.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method for an inkjet printer for indoor and outdoor prints,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method of an ink jet printer for indoor and outdoor printed matter,

More specifically, in the case of printing an indoor print such as an outdoor print (or sign) such as a placard or various indoors use stickers using an inkjet print, In order to prevent a printing quality defect due to a banding phenomenon in which a printed matter is drawn in a printing direction due to a problem, all the nozzle holes of the nozzle of the ink jet printer are divided into a plurality of nozzle hole sets, An ink jet printer for indoor and outdoor prints which performs printing using an overlap area added for obtaining a high quality and satisfying a reference printing density after basic printing by assigning different printing patterns (including printing density) And a printing method.

As a conventional technique related to a printing method such as an ink jet printer, there is a patent registration No. 10-0894700 (registered on Apr. 16, 2009) [inkjet printing method]

The above patent is directed to an inkjet printing method capable of improving an error of an inkjet image and maintaining a certain printing speed,

A step of inputting Gerber data, a step of converting Gerber data into bitmap data of n resolution, inputting a diameter of the droplet of the droplet and a superposition ratio between the droplet of the droplet, And converting the bitmap data of n resolution into bitmap data of m (< n) resolution, thereby improving print quality and printing speed and improving data processing speed To be able to do.

However, the patent does not directly relate to printing defects, especially preventing banding phenomena.

In addition, there is a printer and printing method disclosed in Japanese Patent Application Laid-Open No. 10-2010-0014888 (published on Feb. 11, 2010)

The disclosed technology provides print data consisting of a plurality of dot information to a printing head on which a plurality of dot forming elements are arranged along a sub scanning direction, Is moved in the main scanning direction and the sub scanning direction to move the head in the scanning direction in an ink jet printer which prints an image on the surface of a printing medium And more particularly, to a printer and a printing method,

It is an object of the present invention to prevent occurrence of a line in the scanning direction of the head on the joint of print data of an image to be printed.

However, this patent corresponds to a technology that is not suitable for universal application to general inkjet printers.

Next, Patent Registration No. 10-1214281 (registered on December 13, 2012) [inkjet printing method and inkjet printing apparatus to which the method is applied]

The patent discloses an inkjet printing method capable of not only achieving high quality print quality by executing a print job on a printing object using both low-resolution bitmap data and high-resolution bitmap data, but also preventing the occurrence of bulge And an ink-jet printing apparatus to which the method is applied.

However, this patent also has no direct relation to the prevention of banding phenomenon.

Further, Patent Registration No. 10-1197869 (filed on October 30, 2012) [Printing method and printing apparatus for forming a print layer on the surface of a synthetic resin element and its product]

[0001] The present invention relates to a printing method and a printing apparatus for forming a printed layer of a specific pattern on the surface of an element made of a synthetic resin constituting a slide fastener, and a slide fastener product produced thereby,

A printed layer is formed by pressing a stamp on the surface of an element, a roller type stamp is rolled over the element surface to form a printed layer, and the stamp is heated to a predetermined temperature so that heated heat and pressure are simultaneously applied to the surface of the element, And a pattern is formed on the surface of the element.

However, this patent also has no direct relation to the prevention of banding phenomena.

Accordingly, it is an object of the present invention to provide a printing apparatus and a printing method thereof, which can prevent printing defects due to a banding phenomenon in which a print head is stuck in a printing direction due to a defective state of a nozzle hole of a print head when an indoor / outdoor print is printed using an ink- The entire nozzle holes of the nozzles of the ink jet printer are divided into a plurality of nozzle hole sets and the printing patterns are assigned differently for each nozzle hole set so as to satisfy the reference printing density after the basic primary printing, Another object of the present invention is to provide a printing method for an indoor / outdoor inkjet printer which performs an additional secondary printing using a printing pattern in an overlap area.

In addition, the present invention is characterized in that the nozzle holes of the ink jet printer are activated nozzle holes corresponding to a part of all the nozzle holes, thereby preventing the occurrence of the banding phenomenon and simultaneously raising the reference printing speed, It is another object of the present invention to provide a printing method for an ink jet printer for a door print product.

Further, the present invention can be applied to printing of a nozzle blank set of an active nozzle blank, a normal nozzle blank set prints a normal pattern, and a specific or overlapped nozzle blank set prints in various types of print patterns, And more particularly, to a printing method for an ink jet printer for printed materials for indoor and outdoor use.

In addition, the present invention is characterized in that the overlapping portion of the basic print area and the additional print area includes a print area located at the end of the basic print area, so as to improve print quality and reference print speed, And to provide a printing method for an ink jet printer.

According to an aspect of the present invention, there is provided a printing method for an inkjet printer for indoor and outdoor printed matter,

(a) dividing all the nozzle holes of a nozzle of an ink jet printer into a plurality of nozzle hole sets, and allocating a print pattern including a printing density for each nozzle hole set;

(b) basic primary printing on the printed material such that a printing area corresponding to the assigned printing pattern is formed for each nozzle blank set; And

(c) a secondary printing step of printing the printing pattern so as to further overlap the printing area corresponding to the printing density assigned to each nozzle blank set in a printing area that is less than the reference printing density; .

Further, in the printing method of the ink jet printer for the printed matter for indoor and outdoor according to the present invention

The active nozzle holes are divided into a set of overlapping print active nozzles and a set of non-overlapping print active nozzles,

the portion where the primary printing region of the step (b) and the secondary printing region of the step (c) are overlapped include a printing region located at the end of the secondary printing region,

The nozzle holes of the ink jet printer in which the steps (b) and (c) are performed are active nozzle holes corresponding to a part of all the nozzle holes,

It is preferable that the print density assigned to the nozzle blank set of the active nozzle hole is set to be the central nozzle set rich and the set of one or both end nozzle set blurred.

The printing method of an ink jet printer for indoor and outdoor printed matter according to the present invention is characterized in that all the nozzle holes of the nozzle of the ink jet printer are divided into a plurality of nozzle hole sets and the printing patterns are assigned differently for each nozzle hole set, After the printing, printing is performed in such a manner that various printing patterns are used in the overlap region to satisfy the reference printing density and high quality, and printing of the prints for indoor and outdoor using the inkjet print, It is possible to prevent printing defects due to a banding phenomenon such as a line in the printing direction on the printed matter due to a problem of defects and the nozzle holes of the ink jet printer are active nozzle holes corresponding to a part of all the nozzle holes It can block the occurrence of banding phenomenon and increase the basic printing speed at the same time. The printing state assigned to the nozzle hole set of the active nozzle hole can be set so that the normal nozzle hole set prints a normal pattern and the specific or overlap nozzle set cooperates with various types of print patterns And a printing area which is located at the end of the basic printing area is included in a part where the basic printing area overlaps with the specific printing area, and the printing quality and the reference printing speed Can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a photograph and a drawing of a general sine printing inkjet printer and a nozzle. Fig.
2 is a diagram related to a banding phenomenon occurring in printing using a conventional inkjet printer.
3 is a schematic view for explaining a second order printing procedure by a printing method of an inkjet printer for indoor and outdoor printed matter according to the present invention.
4 is a schematic view for explaining a printing procedure in which a third printing is performed according to a printing method of an inkjet printer for indoor and outdoor printed matter according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term &quot; comprising &quot; or &quot; consisting of &quot;, or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 shows photographs of an inkjet printer (IP) for indoor prints such as outdoor prints (or signs) and various indoor use stickers such as a placard, On the right side, an enlarged photograph of the printing situation is attached.

A photograph of the print head IPh, which is separated and enlarged from the head box moving in the printing direction at the time of one printing (that is, one pass), can be seen from the upper left,

Also, the nozzle N of the print head can be confirmed in the lower left one-dot chain line, and a fine nozzle hole Nh is shown in an exaggerated form.

The printing method of an inkjet printer for indoor and outdoor printed matter according to the present invention is a printing method of a large-size sine print such as a placard or a printing area of a printed matter is partially divided into two or more In the case of printing (one printing is generally referred to as a &quot; pass &quot;),

An abnormal output line due to each printing, that is, an ink jetting error due to overlapping, spreading,

That is, due to the problem of the output state of the printing system, a banding phenomenon occurs in which the printed matter is streaked in the printing direction, resulting in poor printing quality.

2 shows a banding phenomenon caused by the widening of the path among the banding phenomenon (the banding line due to the abnormal output can be confirmed on the right side as compared with the normal output printed matter S on the left side). That is, a gap may be generated between the primary printing area P1p by the primary path and the secondary printing area P2p by the secondary path, resulting in a banding phenomenon.

In order to prevent this, it is possible to increase the printing quality by increasing the number of passes, but the productivity that takes time to complete printing is reduced.

The present invention proposes a printing method of an ink jet printer for new indoor and outdoor prints in order to prevent this. In this specification, the term 'sign' means a printed matter such as a placard or a pamphlet, a printed matter such as a wrapping paper, a transfer sheet, a sticker, or a printed matter for various other articles.

Basically, the printing method of an ink jet printer for indoor and outdoor printed matter according to the present invention is characterized in that all the nozzle holes of the nozzle of the ink jet printer are divided into a plurality of nozzle hole sets, and the printing patterns are assigned differently And an image printing method of an indoor and outdoor ink jet printer which performs secondary printing to print various additional printing patterns using an overlap area added to satisfy a reference printing density and obtain high quality after basic primary printing .

3, a method of printing an ink jet printer for indoor and outdoor prints according to the present invention comprises the steps of: (a) dividing all the nozzle holes Nh of a nozzle N of an inkjet printer into a plurality of And a print pattern (including print density) is assigned to each nozzle hole set. The division of the nozzle blank set and the assignment of the printing density thereto are performed by using a controller and an input unit (for example, a touch pad method) of a conventional ink jet printer.

Especially, the nozzle holes of the ink jet printer used for printing are active nozzle holes (Na) corresponding to a part of the entire nozzle holes,

3 and 4, an assigned printing density IC is displayed on the right side of the entire nozzle N, and an active nozzle hole Na is shown on the right side thereof, , The left side indicates the primary printing, and the right side indicates the next secondary (Figs. 3 and 4) and the tertiary (Fig. 4) printing.

In an inkjet printer (IP) for ordinary indoor and outdoor prints (or prints for signing), the print head IPh moves in the printing direction during the primary printing, and when the printing is performed after the secondary printing, S) (s) is moved.

It is possible to increase the printing quality through printing more than the second order and to utilize the nozzle holes in the middle part without using the end nozzle hole which is likely to cause clogging of the nozzle hole, So that printing can be performed.

3 and 4, the print pattern (including print density) assigned to each nozzle cavity set of the active nozzle holes Na is mainly concentrated in the central nozzle set, the one-end or both-end nozzle set is blurred, Na), it is possible to prevent the banding phenomenon due to the edge nozzle hole, which is likely to cause errors such as clogging.

In Fig. 3, the print patterns of the nozzle sets H2 and H3 at both ends (directional designation with reference to the drawing) are allocated, in particular, the print density of 50% which is half the target reference print density (100%) , The central nozzle hole set) H1 is assigned a print density of 100% equal to the reference print density.

(B) a primary printing step is performed on the printed matter so that a printing area corresponding to the printing pattern assigned to each nozzle set, in particular, the printing density, is formed in the first pass of the print head IPh, that is, the first printing step .

The primary printing area S1 corresponding to the upper half of the printed material S is formed by primary printing and the uppermost printing area S1 corresponding to 100% of the reference printing density is set in accordance with the assigned printing density of the active nozzle sets H1 and H3 , And a print area S1b corresponding to 50% of the reference print density is formed in the lower part (center in the printed matter reference).

Next, the secondary printing of the print head IPh, that is, the secondary printing step (c), the secondary printing is performed in such a manner that the printing area is overlapped with the printing density assigned to each nozzle hole set in the printing area that does not meet the reference printing density The step proceeds.

The secondary printing area S2 corresponding to the lower half of the printed product S is formed in the secondary printing and the uppermost printing area S2 corresponding to 50% of the reference printing density is set in accordance with the assigned printing density of the active nozzle sets H1 and H1 And the printing area S2a corresponding to 100% of the reference printing density is formed in the lower part (the center in the printed matter reference), thus completing the printing.

The primary printing area Sb corresponding to 50% of the reference printing density and the secondary printing area S2b overlap each other to implement the reference printing density, so that the primary printing area of step (b) and the primary printing area of step The portion where the secondary printing area overlaps includes the printing area located at the end of the primary printing area.

During the primary printing by the controller, the upper nozzle set H2 of the active nozzle set Na is closed, and in the secondary printing, the lower nozzle set H3 of the active nozzle set Na is closed .

The active nozzle holes for printing in the first and second printing steps are divided into a set of overlapping printing active nozzles and a set of non-overlapping printing active nozzles,

Furthermore, it is preferable that the portion where the primary printing region of the step (b) overlaps with the secondary printing region of the step (c) includes a printing region located at the end of the secondary printing region.

The characteristic of the printing method according to the present invention is that a second or more printing is performed in order to complete one printed matter (including a case in which a repeating pattern is formed like a wallpaper), and even if a third or more printing step is performed It is preferable that the divisional characteristics of the active nozzle set and the non-overlapping print active nozzle set and the overlap area overlap each other at the end of the next printing area.

Next, FIG. 4 schematically shows a printing method which is performed until the third printing.

(a), the print density assigned to the active nozzle holes of the printhead (IPh) nozzles N is set such that the upper nozzle set h2 for the reference print density is 25 Then the nozzle set h1a is then 50%, then the nozzle set h3 is 35%, then the nozzle set h1b is 50% and the last set of nozzles h4 is 40% , Which is divided into a total of five sets of nozzle holes.

In the primary printing in the step (b), the upper half of the printed matter s is printed, and the printing is carried out through the upper 50% concentration nozzle hole set h1b and the lower 40% concentration nozzle hole set h4, A 50% density upper printing area s1a and a 40% density lower printing area s1b are formed in the primary printing area s1.

the secondary printing in the step (c) is performed over the entire printed matter s,

The nozzle hole set h1a of the upper 50% concentration, the nozzle hole set h3 of the lower 35% concentration and the nozzle hole set h1b of the lower 50% concentration, and the nozzle hole set h4 ), Printing is carried out through the secondary printing area s2 as a printing area s2a at a density of 50%, a printing area s2b at a density of 35%, a printing area s2c at a density of 50% A printing region s2d is formed.

The secondary printing area s2a of the 50% density in the secondary printing and the printing area s1a of the 50% density in the primary printing are overlapped to achieve the reference printing density of 100%

A 35% density secondary printing area s2b in the secondary printing and a 40% density printing area s1b in the primary printing are superimposed to form an overlap printing area of 75% concentration.

Further, the third printing is carried out. The nozzle set h2 of the upper 25% concentration, the nozzle set h1a of the lower 50% concentration, the nozzle set h3 of the lower 35% concentration, Printing is carried out through a nozzle hole set (h1b) at a concentration of 50% and a nozzle hole set (h4) at a concentration of 40%

A printing area s3a having a density of 25%, a printing area s3b having a density of 50%, a printing area s3c having a density of 35%, a printing area s3d having a density of 50% A printing area s3e having a density of 40% is formed.

The overlap printing area of 75% density formed by overlapping the 35% density secondary printing area s2b in the secondary printing and the 40% density printing area s1b in the primary printing overlaps the 25% The reference printing density 100% is achieved by the further overlap of the third printing area s3a of the density,

The reference printing density 100% is also achieved by overlapping of the 50% density third printing area s3b in the third printing and the 50% density second printing area s2c in the second printing,

A 35% density third printing area s3c in the third printing and a 40% density secondary printing area s2d in the second printing are overlapped to form an overlap printing area of 75% concentration.

Through the repetition of this process, a printing method suitable for a printed matter requiring continuous repetitive printing such as a packaging film can be realized.

The third printing area s3d of the 50% density and the third printing area s3e of the 40% density in the third printing are the same as the printing density of the first printing area, and then the second and third printing described above are repeated And the same repetitive printing is performed.

It is preferable that the active nozzle holes not used in the first, second, and third printing steps are closed.

In FIGS. 3 and 4, printing by the ink ejected from each active nozzle hole can print various characters and patterns such as gradation as in normal printing, and the printing density And can be variously selected.

In the above description, conventionally known techniques relating to ink jet printers in general, in particular, determination of active and inactive areas of nozzle holes, selection control of print density, and the like have been omitted, but those skilled in the art can easily guess and deduce have.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited thereto. Various modifications, additions and substitutions are possible, The present invention is not limited thereto.

IP: Inkjet printer IPh: Printhead
N: Nozzle Nh: Nozzle Ball
Na: Active nozzle ball
H1, H2, H3, h1a, h1b, h2, h3, h4:
S, s: printed matter S1, S1a, S1b, s, s1a, s1b: primary printing area
S2, S2a, S2b, s2, s2a, s2b, s2c, s2d:
s3a, s3b, s3c, s3c, s3d, s3e: third printing area

Claims (4)

(a) dividing all the nozzle holes of a nozzle of an ink jet printer into a plurality of nozzle hole sets, and allocating a print pattern including a printing density for each nozzle hole set;
(b) basic primary printing on the printed material such that a printing area corresponding to the assigned printing pattern is formed for each nozzle blank set; And
(c) a secondary printing step of printing the printing pattern so as to further overlap the printing area corresponding to the printing density assigned to each nozzle blank set in a printing area that is less than the reference printing density;
And a printing method for an inkjet printer. The method according to claim 1,
Wherein the nozzle holes of the ink jet printer in which the steps (b) and (c) are performed are active nozzle balls corresponding to a part of all the nozzle holes. 3. The method of claim 2,
Wherein the active nozzle holes are divided into a set of overlapping print active nozzles and a set of overlapping non-overlapping print active nozzles. 4. The method according to any one of claims 1 to 3,
wherein a portion overlapping the primary printing region of the step (b) and the secondary printing region of the step (c) includes a printing region located at the end of the secondary printing region.

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